add bzip2 package (#28)

Static build of bzip2 1.0.8 (libbz2.a + bzlib.h) for use as a
vendored dependency in openpilot replay/cabana tools.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

bzip2/pyproject.toml

@@ -0,0 +1,15 @@
+[build-system]
+requires = ["setuptools>=64", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "bzip2"
+version = "1.0.8"
+description = "bzip2 compression library (static build)"
+requires-python = ">=3.8"
+
+[tool.setuptools.packages.find]
+include = ["bzip2*"]
+
+[tool.setuptools.package-data]
+bzip2 = ["install/**/*"]